I think you can start with the proposition that the appointing power under section 24 does not say anything about the Prime Minister at all; it just speaks about the Governor General. It doesn't restrict in any way the kinds of consultations that the Prime Minister can undertake or the considerations the Prime Minister can take into account.
All the bill is really doing is providing a mechanism, a purely optional mechanism, for a formal consultation in respect of the wishes of the electorate. It's not adding anything that can't be done now. It's formalizing exactly how the consultation will take place. It will take place as part of a general election or a provincial election. You'll use the single transferable vote method of counting, etc.
So that's why I say it's in the safe ground—it's optional and it simply provides a mechanism of consultation that is not very different from what the Prime Minister is free to do right now.